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Variants
The M1D4-12B is a 12" dual‑voice‑coil (DVC) 4‑ohm marine subwoofer from Rockford Fosgate’s Color Optix™ lineup. It combines low‑frequency performance with marine‑grade construction and integrated lighting compatibility.
Buyer confidence
88%Highlights
- 2-Year Warranty
- Zinc Nickel-plated Marine grade brass connection terminals
- Santoprene VAST Surround
- VAST vertical attach surround technique increases effective radiating cone area up to 25%
Key specs
Full specs- Size
- 12"
- Voice Coil Type
- Dual Voice Coil
- Nominal Impedance (Ohms)
- 2-Ohm or 8-Ohm Switchable
- Frequency Response
- 20 Hz - 750 Hz
- Power Handling (Watts RMS)
- 300 Watts RMS 1200 Watts PEAK
- Voice Coil Diameter
- 2" (50 mm)
- Magnet Weight (oz)
- 39.75 oz. (1.13 Kg)
- Fs (Hz)
- 27
Key specs
Full specs- Size
- 12"
- Voice Coil Type
- Dual Voice Coil
- Nominal Impedance (Ohms)
- 2-Ohm or 8-Ohm Switchable
- Frequency Response
- 20 Hz - 750 Hz
Highlights
Overview- 2-Year Warranty
- Zinc Nickel-plated Marine grade brass connection terminals
- Santoprene VAST Surround
Overview
The M1D4-12B is a 12" dual‑voice‑coil (DVC) 4‑ohm marine subwoofer from Rockford Fosgate’s Color Optix™ lineup. It combines low‑frequency performance with marine‑grade construction and integrated lighting compatibility.
Best for
- Boaters and marine audio enthusiasts who want reinforced bass from a purpose‑built subwoofer
- Systems that will use external Color Optix™ lighting control (for coordinated speaker illumination)
- Installations needing marine‑rated components and plug‑and‑play connectivity
Key points
- 12" dual‑voice‑coil (DVC) 4‑ohm subwoofer (sold individually)
- Color Optix™ lighting compatible — requires PMX‑RGB controller and RF Connect™ app for lighting control
- Element Ready™ design for marine environments (built to resist water, salt, and UV exposure)
- Integrated Deutsch™ / Amphenol™ connections for marine plug‑and‑play connectivity
- VersaSwitch™ for changing impedance between 2 and 8 ohms
- Testing and verification: Klippel verified and subjected to ASTM and vibration testing
Fit and use
This subwoofer is intended for marine audio use. It is sold individually; confirm quantity needed for your system. For lighting functionality, add the PMX‑RGB Color Optix™ controller and use the RF Connect™ app. The integrated Deutsch/Amphenol connections simplify compatible marine installations.
What to know
Color Optix™ lighting requires the PMX‑RGB controller and the RF Connect app to adjust colors and effects. The product is described as Element Ready™ and references IP67 certification in the product text for marine protection. VersaSwitch™ lets you change subwoofer impedance to match amplifier and system requirements.…
Highlights
Key features
- 2-Year Warranty
- Zinc Nickel-plated Marine grade brass connection terminals
- Santoprene VAST Surround
- VAST vertical attach surround technique increases effective radiating cone area up to 25%
- Vented motor design with water-repelling nano coated mesh screen
- Fully insulated silicone tinsel leads
- Ultra-bright wide-angle RGB LEDs provide rich, reliable illumination
- Industry’s first molded in-frame connectors for simple connectivity in addition to conventional spade terminals
- Integrated Deutsch™/Amphenol™ connectors make wiring connections simple and error proof
- VERSA impedance switch quickly allows series or parallel configuration without additional wiring
- 2" (50mm) High Temp Kapton™ Woofer Voice Coil Former
- Linear Synthetic Fiber Blend Spiders
More info
Manufacturer details
The M1D4-12B Color Optix™ 12” DVC 4-Ohm subwoofers deliver loud, clear, accurate bass, and light the way for your journey! Sold individually (1 each).
Color Optix™: Adjust your own bright, wide, and limitless lighting experience with the Rockford Fosgate Color Optix™ plug-and-play controller (sold separately) and App.
Element Ready™: Purpose Built for the Marine Environment, Rockford’s Element Ready™ products are built to stand up to Water, Salt, and UV rays, making sure your subwoofers stand the test of time.
True Marine Ecosystem: Integrated Deutsch™ / Amphenol™ connections provide industry leading marine plug-and-play connectivity and flexible install options.
Color Optix™: Requires PMX-RGB controller and RF Connect™ App
Color Optix™ Speakers | Launch
Color Optix™ Speakers | Overview
Color Optix™ Controller | Overview
Additional details
The M1 series of Element Ready™ subwoofers are designed to pair with the Rockford Fosgate Color Optix™ Controller and RF Connect App through its Deutsch™ and Amphenol™ connectors integrated into the basket. This combined with their IP67 certification make these speakers Element Ready™ and truly purpose built for marine applications. To compliment the plug and play connectivity and streamline installation, M1 subwoofers are equipped with a VersaSwitch™ to make changing impedance between 2 and 8 ohms as easy as flipping a switch.
Technologies
Element Ready™ | Subwoofers
All components are protected against harsh outdoor elements like Dust, UV, Temperature, Water, Corrosion &
ASTM B117 Testing
ASTM B117 500Hr Salt/Fog Testing Standards
Klippel Verified
To adorn the ‘Verified with Klippel’ mark, the qualifying company’s loudspeaker engineering personnel must be
ASTM G154 Testing
ASTM G154 500Hr Accelerated UV testing
IPX6 Water Intrusion Rated
A device with a level 6 water resistance rating can survive strong water jets projected by a 12.5mm nozzle at any
ISO60068-2-64 Vibration Testing
ISO60068-2-64 Vibration testing standards ensure the product is durable and can withstand vibrations found on
VAST Surround - Marine
Rockford Fosgate's proprietary surround technique, VAST, provides up to a 25% increase in the speakers effective
VERSA Switch
Allows you to easily configure a 2Ω Dual Voice Coil subwoofer into 1Ω / 4Ω or a 4Ω DVC sub into 2Ω / 8Ω with the
Specs
Specifications
24
| Size | 12" |
| Voice Coil Type | Dual Voice Coil |
| Nominal Impedance (Ohms) | 2-Ohm or 8-Ohm Switchable |
| Frequency Response | 20 Hz - 750 Hz |
| Power Handling (Watts RMS) | 300 Watts RMS 1200 Watts PEAK |
| Voice Coil Diameter | 2" (50 mm) |
| Magnet Weight (oz) | 39.75 oz. (1.13 Kg) |
| Fs (Hz) | 27 |
| Re (Ohms) | 7.6 |
| Le (mH) | 3.40 |
| Sd (cm2) | 585.4 |
| Qms | 8.20 |
| Qes | 0.63 |
| Vented Box Volume (Vb) | 2.45 cu. ft. (69.38 Liters) |
| Sealed Box Volume (Vb) | 1.65 cu. ft. (46.72 Liters) |
| Qts | 0.59 |
| Vas | 113.1 |
| SPL (dB @ 1w/1m) | 92 |
| Xmax (mm) | 6.0 |
| Woofer Displacement | 3.49 (0.12 Liters) |
| Speaker Connector | Deutsch™ |
| Cutout Diameter | 10.85" (275.6 mm) |
| Mounting Depth | 6.65" (169.1 mm) |
| Shipping Weight | 9 Lbs. (4.1 Kg.) |
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Installation resources
Wiring diagrams
9
Wiring Diagram #1
Source: Rockford Fosgate
Wiring Diagram #2
Source: Rockford Fosgate
Wiring Diagram #3
Source: Rockford Fosgate
Wiring Diagram #4
Source: Rockford Fosgate
Wiring Diagram #5
Source: Rockford Fosgate
Wiring Diagram #6
Source: Rockford Fosgate
Wiring Diagram #7
Source: Rockford Fosgate
Wiring Diagram #8
Source: Rockford Fosgate
Wiring Diagram #9
Source: Rockford Fosgate
Support
Return Authorization
If you bought this product from Onkar Electronics, use the Contact Us page on the Onkar Electronics website and we will help with return authorization and warranty support. If you purchased it from another dealer, contact that authorized dealer first for return assistance.
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